JPH0346128Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a dial lock with a code conversion mechanism that has a function of converting dial codes.

(Prior Art) Conventional dial locks of this type with a code conversion mechanism include those shown in FIGS. 4 to 6, for example. In the figure, reference numeral 1 is a dial lock, in which a plurality of tumblers 4 with a code conversion function are rotatably supported on a shaft 3 of a dial 2, and the shaft 3 is rotatably supported.
The fixed tumbler 5 is directly fixed to the tumbler 5 and housed in the casing 6.The tumbler 5 is directly fixed to the tumbler 5 and housed in the casing 6. The lock is unlocked by retracting the stopper protrusion 8a of the arm 8, which is connected to the latch 7, which protrudes and retracts further.

Thus, the tumbler 4 with a code conversion function includes a ring-shaped actuating disk 9, a ring-shaped actuating disk 9 which is held between both sides, and a fitting groove 10a in a part of the outer periphery.
It is composed of outer disks 10 and 11 having a diameter 11a formed thereon.

That is, sawtooth-like uneven teeth 9a are formed on the outer periphery of the operating disk 9, and a pusher 9b is rotatably inserted into the center thereof. This pusher 9b has an engaging protrusion 9 that protrudes from one side of the fan-shaped hole 9c of the actuating disk 9 and is used to engage the adjacent tumbler 4 with a code conversion function or the fixed tumbler 5.
d is provided.

Further, thin cam plates 12 and 13 are attached to the outer disk 10 along its outer periphery by pins 14 and 14 so as to be opposed and rotatable. On one end side of the cam plates 12, 13, there are meshing portions 12a, 13 that mesh with the uneven teeth 9a on the outer periphery of the actuating disk 9.
cam surfaces 12b and 13b are formed at the other end. And this cam surface 12b,1
A cam plate 15 is sandwiched and pivotally supported by the outer disk 10 and the outer disk 11 opposite to the outer disk 3b. The cam body 15 has uneven teeth 9a and a meshing portion 12.
A cam rotation hole 15a is bored for releasing the meshing with the cams 13a and 13a. Rod-shaped elastic bodies 17a, 17 are attached to fixing pins 16a, 16b attached to both sides of the outer disc 10 with the fitting groove 10a in between.
One end of b is attached, and the elastic bodies 17a, 17
The other end of b engages with the engaging surfaces 12c and 13c of one end of the cam plates 12 and 13, and urges the one end side of the cam plates 12 and 13 to constantly expand.

However, when this type of dial lock with a code conversion mechanism is installed in a small safe installed in each room of a hotel, inn, etc., it is necessary to convert the dial code each time the guest changes. To do this, the cam rotation holes 15a of the cam bodies 15 of the plurality of tumblers 4 are aligned, and the cam bodies 15 are rotated to release the engagement between the engagement parts 12a, 13a of the cam plates 12, 13 and the uneven teeth 9a. , the actuating disk 9 is replaced by the outer disk 1
It was necessary to be able to rotate freely between 0 and 11.

(Problem to be solved by the invention) Conventional dial locks with a code conversion mechanism of this type are
When the plurality of cam rotation holes 15a formed in the cam body 15 are all made to match in order to change the sign,
The stopper protrusion 8a will fit. In order to prevent this, there was a drawback in that, in addition to the unlocking indicator, a code conversion indicator indicating the code conversion position of the dial had to be engraved at a different position.

The present invention was developed in view of the above-mentioned drawbacks of the conventional technology, and is a dial with a code conversion mechanism that combines the unlocking index and code conversion index of a dial lock into one, and allows code conversion to be performed at the unlocking index position. The purpose is to provide locks.

(Means for Solving the Problems) Therefore, in the present invention, a code conversion mechanism equipped dial lock is rotatably attached to an outer disc that holds an operating disc rotatably supported on a dial shaft from both sides. A tumbler with a code conversion function formed on a pair of pivotally supported cam plates and having a meshing part that engages and disengages from the operating disk, a fixed tumbler directly connected to the dial shaft, and a tumbler formed on the outer periphery of both tumblers. A latch that fits into the fitting groove to unlock the dial lock and prevents rotation of the dial shaft, and a mating portion of a pair of cam plates rotatably supported on the outer disk. A cam body that engages and disengages from the concave and convex teeth of the actuating disk, an actuating plate that has a hole corresponding to the cam rotation hole formed in the cam body, and a mechanism that engages the latch in conjunction with the rotation of the actuating plate. It is composed of a release plate that releases the fitting into the mating groove.

(Function) With this configuration, when the actuating plate is rotated, the release plate pushes out the latch fitted in the fitting groove from the fitting groove and releases the fitting, so that the dial can be rotated. It was possible to combine the index for unlocking the lock and the index for code conversion into one.

(Example) Next, an example of implementation of the present invention will be described with reference to the drawings. Figures 1a and 1b are a rear view showing the internal mechanism of the dial lock of the present invention and a front view showing the back cover;
FIG. 2 is a perspective view showing the entire dial lock, and FIG. 3 is a rear view for explaining the operation of the present invention.
In this embodiment, the difference from FIGS. 4 to 6 is the configuration of the stopper release mechanism for operating the code conversion mechanism, so FIGS. 1 to 3 are the same as FIGS. 4 to 6. Components are given the same reference numerals, and their explanations are omitted, and only the different parts will be explained.

In the figure, 20 is a dial lock, in which a plurality of tumblers 4 with a code conversion function are rotatably supported on the shaft 3 of the dial 2 in the housing 6, and are fixed directly to the rearmost end of the shaft 3. The tumbler 5 is housed in a fixed manner, and the housing 6 also includes a latch 21 that protrudes and retracts from the top surface of the housing 6.
A stopper protrusion 21a is provided which protrudes integrally from the lower part of the magnet 23 and latch 21 to which the support plate 22 of 1 is attracted, and which fits into the fitting grooves 10a, 11a, 5a of the tumblers 4, 5. Also, housing 6
The back opening is closed by a back cover 24.

The back cover 24 has a square hole 25a corresponding to the cam rotation hole 15a of the cam body 15 rotatably supported between the outer discs 10 and 11 of the tumbler 4 with a code conversion function. A perforated actuation plate 25 is pivotally supported. This actuating plate 25 has a push-out piece 25b and a return piece 25b at a predetermined distance around it.
5c is provided in a protruding manner, and notches 25d and 25e are formed in the actuating plate 25 at approximately the same spacing as the spacing between the push-out piece 25b and the return piece 25c. The actuating plate 25 is rotated intermittently while being in contact with each other. Further, in the vicinity of the actuation plate 25, there are two arm pieces 27a and 27b that rotate and push out the stopper protrusion 21a along the sliding direction in conjunction with the rotation of the actuation plate 25.
A release plate 27 is pivotally supported.

In addition, in the figure, 28 is an index engraved on the dial cover 29 of the dial 2, 30 is a pin insertion hole drilled in the back cover 24, and 31 is a square pin inserted into the pin insertion hole (first (see figure c).

The dial lock configured in this way is constructed by aligning the fitting grooves 10a, 11a of the tumbler 4 with code conversion function and the fitting groove 5a of the fixed tumbler 5 in correspondence with the stopper protrusion 8a. are fitted into the fitting grooves 5a, 10a, and 11a, and the rotation of the dial 2 is stopped.

However. At the time of code conversion, the hole 25a of the camera back 24
By inserting a pin (not shown) drilled in a corresponding position and rotating the actuation plate 25 of the stopper release mechanism, the push-out piece 25b of the actuation plate 25 pushes up the arm piece 27a of the release plate 27. , rotate the release plate 27. For this reason, the release plate 27
The arm piece 27b comes into contact with the stopper protrusion 8a and pushes it out along the sliding direction, so the fixed tumbler 5 becomes freely rotatable. In addition, by rotating a square pin (not shown), the cam body 15 expands the cam plates 12 and 13 that are pivotally supported on the outer disk 10, and engages the meshing portions 12a and 13a with the uneven teeth 9a. Since this will be canceled, the code can be freely converted by rotating the dial 2.

(Effects of the invention) The invention is constructed as described above, and is directly connected to the dial shaft using a mechanism that releases the mesh between the meshing part of the cam plate for code conversion and the concave and convex teeth of the operating disc. Since the latch that suppresses the rotation of the fixed tumbler is pushed out from the engagement groove by the release plate that rotates along the sliding direction, the dial lock has one indicator for unlocking and one indicator for code conversion. The advantage is that the code conversion operation can be easily performed and the manufacturing cost can be reduced.

[Brief explanation of the drawing]

Figures 1a and b are a rear view showing the internal mechanism and a front view of the back cover of the dial lock with code conversion mechanism according to the present invention, Figure 1c is a rear view showing the back cover, and Figure 2 is the present invention. A perspective view showing the entire dial lock, No. 3
The figure is a rear view for explaining the operation of the present invention.
The figure is a rear view showing the internal mechanism of a conventional code conversion mechanism equipped dial lock, FIG. 5 is an exploded perspective view showing the code conversion mechanism used in both the conventional code conversion mechanism and the present invention, and FIG.
The figure is a front view for explaining the operation of the code conversion mechanism used in both the conventional system and the present invention. 2: Dial, 3: Axis, 4: Tumbler with code conversion mechanism, 5: Fixed tumbler, 9: Operating disc, 9
a: uneven teeth, 10, 11: outer disk, 10a, 1
1a: Fitting groove, 12, 13: Cam plate, 12a, 1
3a: meshing part, 15: cam body, 15a: cam rotation hole, 20: dial lock, 21: latch, 25:
Actuation plate, 25a: hole, 27: release plate.

Claims (1)

[Scope of utility model registration request] An operating disc rotatably supported on a dial shaft, an outer disc that holds the operating disc from both sides and has a fitting groove on a part of its outer periphery, and a half-rotation member on a part of the outer disc. It consists of a pair of freely pivoted cam plates and a cam body that drives the cam plates, and a meshing part formed at the tip of the cam plate engages the uneven teeth formed on the outer periphery of the operating disk. In the dial lock with a code mechanism, the fixed tumbler is directly connected to the dial shaft, and the dial lock is fitted into a fitting groove formed in the tumbler with the code conversion mechanism and the fixed tumbler. A latch that unlocks the lock and prevents rotation of the dial shaft, and a cam body that engages and disengages the meshing portion of a pair of cam plates rotatably supported by the outer disk with the concave and convex teeth of the operating disk. an actuating plate having a hole at a position corresponding to the cam rotation hole formed in the cam body; and a release plate that communicates with the rotation of the actuating plate to release the latch from the fitting groove. A dial lock with a code conversion mechanism.